Casting machine



Jan. 13, 1942. H. KELLY 2,259,669

I CASTING MACHINE File dDeo. 26', 1959 2 Sheets-Sheet 1 INVENTKOR.MICHAEL H. KELLY I ATTORNEYS Jan. 13, 1942. M. H 'KELLY- 2,269,669

CASTING MACHINE Filed Dec. 26, 1939 2 Sheets-Sheet 2 a INVENTOR- MICHAELH. KELLY BY I 54 4 I ATTORNEYS Patented Jan. 13, 1942 CASTING MACHINEMichael H. Kelly, Detroit, Mich, assignor to Kelsoy-Hayes Wheel Company,Detroit, Mich., a corporation of Delaware Application December 26, 1939,Serial No. 310,988

8 Claims. (or. 22-65) The invention relates to casting machines. andrefers more particularly to machines for casting liners in brake drumshells.

The invention has for an object to provide an improved casting machinehaving means for heating the shell and means for externally supportingthe shell, the heating means being movable into inoperative position andthe external supporting means being movable into operative position atthe same time. 7

The invention has for another object to pro-- vide improved mechanismior simultaneously moving the heating means and the external supportingmeans.

The invention has for further. objects to provide a simple constructionof fluid operated devide a second fluid operated device for retardingthe movement of the heating means during the final portion of itsmovement to inoperative position; v v These and other objects of theinvention will 7 become apparent from the following description,

a casting unit for centrifugally casting a cast 'vice for moving theheating means and to proouter ends the ring which "carries the sealingelement [5. The sealing element comprises the annular adaptor plate Itfixedly secured to the A inner side of the ring 14 and the annularsealing member I! located in a recess in theinner side of the adaptorplate. The sealing ring is formed with the inwardly extending hollow ribIt; the inner or nose portion of which preferably has short parallelsides and the remainder of which has flared sides.

I9 is a second hollow shaft axially. slidable within and guided by thehollow shaft 8. The second shaft is adapted to be reciprocated by thepiston 20 which is reciprocable in the cylinder 2| concentric with theshafts and fixedly secured to the inner side of the pulley 9. A suitablemedium under pressure, preferably-compressed air, may be admitted to andexhausted from either side of the piston through'the pipes 22 and 23under the control of the valve 26 whichis adapted to be manuallyoperated. The valve is of stand- 1 ard construction manufactured by awell known iron liner within the annular flange "of a brake drum wroughtmetal shell. Theshell is preferably formed from a fiat steel .blank by asuitable drawing operation and has the annular flangev I iorm'ed'of thegenerally cylindrical portion 2 and z the enlarged generally cylindricalportion 3 terminating in the flaredportion I. The shellhas the integralgenerally radially extending back or web 5 connecting into theopposite-edge of the annular-flange. The casting unit has the bed 6provided with the upright bearings I spaced from each other. 8 is ahollow shaft journaled in the bearings and having secured to itsinnerendthe pulley S andto its outer end the head II. The pulley is engged by the belts I I which are driven by the electric motor I! suitablysupp rted atone side of the bed 6. I! are rods extending transverselvoutwardly from the head It, the inner ends of the rods being fixedlysecured to the head; The rods have fixedly secured to theirmanufacturing concern and receivesthe medium under pressure from thesupply line 24 and pipe 24' andexhausts into the atmosphere through thepipe 25.

.The connection between the second shaft-l9 and the piston 20 comprisesthe piston rod 21, the stud 28 threaded into the outer end of the rodand having the integral collar 25 abutting the inner end of the secondshaft I! and the pin 30 which extends through the outer end of the studand the inner-end portion of the second shaft. The arrangement is suchthat the second shaft is positively reciprocated in both directions andin its outer direction the pin is relieved from shear by the collar uponthe stud. A central abutment 3i and a support 32 are fixed upon theouter end of-the second shaft l!.- The support comprises the body 33which is sleeved upon and I guided bythe rods l3 and the ring 3| whichis positioned concentrically inthe body. The ring is preferably formedwith the internal angularly spaced axially extending ribs 35, theinternal surfaces together forming aninterrupted contour engageable withthe external surfaces of the an nular. portions 2 and 3 and the flaredportion 4 of thebrake drum annular flange to true, size and externallysupport the annular flange and also clamp thefiared portion against thesealing rin while-the molten cast iron is being'poured into the shell; a

38' is a third shaft which is axially slidably mounted in and gulded bythe second shaft s.

:15 The third shaft has fixedly secured to its outer Y end the pilotabutment 39 and is also provided with the collars 46 and ll for slidablyengaging the second shaft. '52 is a coil spring within the second shaftand located between the stud 28 and the third shaft for yieldably urgingthe third shaft axially outwardly to engage the collar Ill with thecentral abutment II. The pilot abutment is adapted to-recelve the web ofthe brake drum shell, the pilot portion being adapted to extend throughthe central opening in the web and the abutment portion being adapted toabut the adjacent portion of the web. The brake drum shell is insertedin the machine by passing the shell downwardly between the sealingelement and the support 32 until thev central opening in its web hasregistered with the third shaft 36 after which the third shaft is urgedinwardly against the resistance of the.

spring 62 and the shell is located on the pilot abutment. Then thespring is permitted to urge the third shaft axially outwardly to therebymove the shell axially outwardly until the collar 40 abuts the abutment3i. At this time the flared portion 4 of the annular flange of the shellloosely engages the sealing ring l1, the uppermost part of the flaredportion resting lightly upon the uppermost part of the rib l8 and theremaining part of the flared portion being spaced sufliciently from therib to permit the passage by the upright post 56 which is journaled inand supported upon the bracket 5| near one end thereof. The bracket islocated at one side of the ring M. The lower end of the post is providedwith the pinion 52 preferably by forming gear teeth integral with thepost. The teeth of the pinion mesh with the teeth of the rack 53preferably 'formed integral with the piston rod 54 axially reciprocablein the bracket 5|. The piston rod is operatively connected at its innerend to the piston 55 which is axially slidable in the cylinder 56formedin the inner end of the bracket. 51 is a pipe leading from theinner end of the cylinder 56 to the pipe 22.

The arrangement is such that upon manual operation of the valve 26 toallow compressed air to enter the cylinder 2! and force the piston 26axially forwardly thereby externally engaging the ring 34 with theannular flange of the brake drum shell, air is at the same timepermitted to enter the inner end of the cylinder 56 .to move device isused to retard the burner during the final portion of its retractilemovement. In detail. 56 isa cylinder mounted on the end of the bracket5| in axial alignment with the cylinder 56. 59 .is a piston within thecylinder 66 and having the reduced end portion 66 adapted to be engagedby the outer end of the piston rod 54-. The outer end of the cylinder."is connected to the pipe 6| which is in communication at all times witha source of compressed air at the same pressure as the compressed air inthe pipe 51. The two cylinders 56 and 58 are preferably of the samediameter. The arrangement is such that when compressed air is admittedto the cylinder 56 and its piston and piston rod are advanced, the-rodduringthe flnal portion of its advancement engages the' reduced endportion 66 of the piston 59,-which latter then yieldably retards furtheradvancement, the parts finally coming to rest in a position determinedby the balance in air pressures in the two cylinders.

6| is a ladle adapted to contain molten iron. The ladle is mounted uponthe arm 62 which is fixed upon the horizontal shaft 63 journaled in thefree end of the arm 66. The latter arm is pivotally mounted upon thebracket 65 to swing through a horizontal path. 66 is a handle upon theshaft 63 for swinging the ladle from inoperative position outside thebrake drum shell to operative position inside the shell and then tiltingthe ladle to pour the molten iron against the annular flange of theshell.

What I claim as my invention is:

1. In a casting machine, the combination with means for rotatablysupporting an annular member, of a gas burner insertable within theannular memberfor heating the same, other means engageable with theexternal surface of the annular member for rotatably supporting thesame, means for simultaneously moving said gas burner from within theannular member and for moving said other means into engagement with theannular member, and means for pouring fluidmaterial into the annularmembe when heated and supported.

2. In a casting machine, the combination with means for rotatablysupporting an annular member, of means insertable within the annularmember for heating the same, means externally engageable with theannular member to rotatably support the same, fluid operated devicesoperatively connected to said heating means and externally engage-ablemeans for respectively moving said heating means away from the annularmember to inoperative position and said externally engageable means tooperative posithe piston 55forwardly to thereby swing the gas burnerfrom its operative position within the brake drum shell to inoperativeposition. In other words, the arrangement provides for s11- multaneouslymoving the gas burner to' inoperative position and the.external supportfor the annular flange of the brake drum shell to operative position.

To prevent objectionable jarring of the machine during the movement ofthe gas burner to its retracted or inoperative position by the fluidoperated device, comprising the air cylinder 56 and the piston 55,another fluid operated tion in external engagement with the annularmember, common means for controlling said fluid operated devices, andmeans for pouring fluid material into the annular member after havingbeen heated and while externally supported.

3. In a machine for casting a Main the annular flange of a wrought metalbrake drum shell, the combination with a sealing element en-. gageablewith the free edge portion of the annular flange, of means for urgingthe shell toward said sealing element, said sealing element and urgingmeans serving to rotatably support the shell, a gas burner insertablewithin the shell for heating the annular flange, an external supportmovable into engagement with the annular flange and adapted to clamp thefree edge portion against said sealing element, said exterviceoperativelyconnected to said her for moving the same in one direction,and a nal support and sealing element sewing to rotatably support theshell, fluid operated means operatively connected to said gas burner andexternal support for simultaneously moving said gas burner from withinthe shell to inoperative position and said external support intoengagement with the annular flange, and means for subsequently pouringliner material into and against the annular flange. i

4. In a machine for casting a liner in an annular portion of a shell,the combination with means for rotatably supporting the shell, of meansinsertable within the shell for heating the.

annular portion, means engageable with the externalsurface of theannular flange for rotatably supporting the same, means forsimultaneously withdrawing said heating means from within the shell andmoving said supporting means into engagement with the annular flange,and means insertable within the shell for pouring fluid liner materialinto the annular flange after having been heated and while externallysupported.

5. In a casting machine, the combination with means for rotatablysupporting an annular member, of a gas burner insertable ithin theannular member for heating the same, a movable member carrying saidburner, a fluid operated desecond fluid operated device opposing saidfirst mentioned device and serving to retard said movable member duringthe 'flnal portion of its movement.

6. In a casting machine, the combination with meansior rotatablysupporting anannular member, of a gas burner insertable-within theannular member for heating the same, a pivotal arm carrying said burner,a member revoluble about its axis for supportingsaid arm, a pair ofaxially spaced cylinders having ports in, their outer ends for thepassage pressure, pistons within said cylinders movable ,toward eachother under pressure of the medium, and a rod connected to one of saidpistons and operatively connected to said revoluble member and adaptedto engage the other of said pistons.

movable mem- 'ment'with the member at 'I. In' a casting machine, thecombination with means for rotatably supporting a'member, of movableheating means for the member, other means movableinto engagement withthe member for holding the same to size, said other means providing forrotatably supporting themember, means for moving 'said heating meansaway from the member to inoperative position other means to operativepcsition in engagemeans for pouring fluid the member while heated andwhile said other means is in operative position.

8. In a casting machine, the combination with means for rotatablysupporting 'a member, of movable heating means for the member. a fluidoperated device operatively connected to said heating meansior movingthe same in one direc tion, and a second fluid operated device opposingsaid first mentioneddevice and servingto retard said heating meansduring its movement.

of a' medium under and said the same, time, and f casting materialagainst

